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Chemistry, 7/e
Raymond Chang, Williams College
Chemical Bonding II: Molecular Geometry and Hybridization of Atomic Orbitals
Self Assessment B
1
Which of the compounds listed below is not linear?
A)
SO
2
B)
CO
2
C)
I
3
-
D)
N
3
-
2
Which of the species below has two nonbonded electron pairs on the central atom?
A)
BCl
3
B)
PCl
3
C)
XeF
4
D)
SF
4
E)
SF
6
3
Which of the following species is not planar?
A)
SF
4
B)
H
2
C=CH
2
C)
BCl
3
D)
XeF
4
4
Which is true for carbon monoxide?
A)
CO has a short CO bond.
B)
CO has a zero dipole moment.
C)
The bond energy in CO is low.
D)
The atoms in CO cannot obey the octet rule.
E)
All of the above are true about CO.
5
Which of the following molecules has no dipole moment and a central atom with sp
3
d hybridization?
A)
PCl
3
B)
BF
3
C)
SF
4
D)
BrF
5
E)
PCl
5
6
If the geometry of around the central atom of an ion or compound is octahedral, what must be the hybridization of the central atom?
A)
sp
B)
dsp
2
C)
dsp
3
D)
sp
3
d
2
E)
The central atom would not have hybridized orbitals.
7
The C
2
H
2
molecule contains _____ pi bonds and the C atoms are ______ hybridized.
A)
2, sp
2
B)
2, sp
C)
1, sp
D)
1, sp
E)
3, sp
8
What is the bond order for the species O
2
+
?
A)
1
B)
1.5
C)
2
D)
2.5
9
Assume that an N
2
molecule absorbs a photon and goes to its first excited state.
A)
The excited N
2
is less stable than N
2
in the ground state.
B)
The excited N
2
is more stable than N
2
in the ground state.
C)
The bond length of N
2
in the excited state is shorter than the bond length of N
2
in the ground state.
D)
B and C are both true.
10
Which of the following has delocalized molecular orbitals?
A)
NO
3
-
B)
CO
3
-
C)
NH
4
>
+
D)
HO>
-
E)
A and B.
2002 McGraw-Hill Higher Education
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